Table 1.
Characteristics of Participants at Phase 7 (2002–2004) of Whitehall II Study
| Participants Included in the Cortisol Analyses (n = 3508) | Participants Excluded from the Cortisol Analyses (n = 3459) | P Value | |
|---|---|---|---|
| Sex, % men | 2636 (75.1%) | 2257 (65.3%) | <.001 |
| Mean age, y, SD | 61.04 (5.94) | 61.44 (6.06) | .005 |
| Current smoker, % yes | 230 (6.6%) | 274 (8.0%) | .056 |
| Employment grade, % lowest | 271 (7.7%) | 489 (14.6%) | <.001 |
| Mean BMI, SD | 26.68 (4.29) | 26.84 (4.49) | .131 |
| Fatigued, % yes | 682 (19.5%) | 700 (21.3%) | .068 |
| Cardiovascular medication, % yes | 1005 (28.6%) | 1135 (33.1%) | <.001 |
| History of CHD, % yes | 467 (13.7%) | 570 (17.2%) | <.001 |
| Type 2 Diabetes, % yes | 238 (6.78%) | 309 (8.9%) | <.001 |
Data are presented as means ± SDs or N (%).